+int isl_seq_last_non_zero(isl_int *p, unsigned len)
+{
+ int i;
+
+ for (i = len - 1; i >= 0; --i)
+ if (!isl_int_is_zero(p[i]))
+ return i;
+ return -1;
+}
+
+void isl_seq_abs_max(isl_int *p, unsigned len, isl_int *max)
+{
+ int i;
+
+ isl_int_set_si(*max, 0);
+
+ for (i = 0; i < len; ++i)
+ if (isl_int_abs_gt(p[i], *max))
+ isl_int_abs(*max, p[i]);
+}
+